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PMA says it offered the ILWU a 5-year contract with 3% annual wage increases, and negotiations will continue, but a lockout could occur in 5-10 days.
Port congestion is causing layoffs and inability to reach overseas consumers.
Move comes as ILWU, PMA talks enter 10th month.
Congress passed a 7-day extension to keep the department running while negotiations over immigration dispute continue.
Texas’s exports reached $289 billion and California topped $174.1 billion in export value for 2014.
Economy grew at 2.2% pace, government says.